package com.clf.springBoot.modules.common.controller;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.RedirectView;

/**
 * @Author: chenglongfei
 * @date: 2022/7/12
 * @Description MyBasicErrorController
 */
@Controller
@RequestMapping("${server.error.path:${error.path:/error}}")
public class MyBasicErrorController implements ErrorController {

    @RequestMapping(produces = MediaType.TEXT_HTML_VALUE)
    public ModelAndView errorHtml(HttpServletRequest request, HttpServletResponse response) {
        HttpStatus status = getStatus(request);
        if (status == HttpStatus.NOT_FOUND) {
            return new ModelAndView(new RedirectView("/common/404"));
        } else  {
            return new ModelAndView(new RedirectView("/common/500"));
        }
    }

    @RequestMapping
    public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {
        Map<String, Object> result = new HashMap<>();
        HttpStatus status = getStatus(request);
        if (status == HttpStatus.NOT_FOUND) {
            result.put("status", status.value());
            result.put("message", "没有找到");
            result.put("data", "/common/404");
            return new ResponseEntity<>(result, status);
        } else {
            result.put("status", status.value());
            result.put("message", "内部错误");
            result.put("data", "/common/500");
            return new ResponseEntity<>(result, status);
        }
    }

    public HttpStatus getStatus(HttpServletRequest request) {
        Integer statusCode = (Integer) request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE);
        if (statusCode == null) {
            return HttpStatus.INTERNAL_SERVER_ERROR;
        }
        try {
            return HttpStatus.valueOf(statusCode);
        }
        catch (Exception ex) {
            return HttpStatus.INTERNAL_SERVER_ERROR;
        }
    }

    /**
     * @deprecated
     */
    @Override
    public String getErrorPath() {
        return null;
    }
}
